diff --git a/htdocs/commande/commande.class.php b/htdocs/commande/commande.class.php
index a4d36e4cf0a..3c44014fa51 100644
--- a/htdocs/commande/commande.class.php
+++ b/htdocs/commande/commande.class.php
@@ -2284,10 +2284,9 @@ class Commande extends CommonObject
 			$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."categorie_product as cp ON cp.fk_product = co.rowid";
 			$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."categorie as c ON cp.fk_categorie = c.rowid";
 		}
-		$sql.= " WHERE 1 = 1";
 		if ($conf->categorie->enabled && !$user->rights->categorie->voir)
 		{
-			$sql.= " AND IFNULL(c.visible,1)=1";
+			$sql.= " WHERE IFNULL(c.visible,1)=1";
 		}
 		$resql=$this->db->query($sql);
 		if ($resql)
diff --git a/htdocs/facture.class.php b/htdocs/facture.class.php
index 54517b9be00..12626b8858f 100644
--- a/htdocs/facture.class.php
+++ b/htdocs/facture.class.php
@@ -2666,10 +2666,9 @@ class Facture extends CommonObject
 			$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."categorie_product as cp ON cp.fk_product = f.rowid";
 			$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."categorie as c ON cp.fk_categorie = c.rowid";
 		}
-		$sql.= " WHERE 1 = 1";
 		if ($conf->categorie->enabled && !$user->rights->categorie->voir)
 		{
-			$sql.= " AND IFNULL(c.visible,1)=1";
+			$sql.= " WHERE IFNULL(c.visible,1)=1";
 		}
 		$resql=$this->db->query($sql);
 		if ($resql)
diff --git a/htdocs/propal.class.php b/htdocs/propal.class.php
index 50c0440d97b..7d047d714b4 100644
--- a/htdocs/propal.class.php
+++ b/htdocs/propal.class.php
@@ -2045,10 +2045,9 @@ class Propal extends CommonObject
 			$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."categorie_product as cp ON cp.fk_product = p.rowid";
 			$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."categorie as c ON cp.fk_categorie = c.rowid";
 		}
-		$sql.= " WHERE 1 = 1";
 		if ($conf->categorie->enabled && !$user->rights->categorie->voir)
 		{
-			$sql.= " AND IFNULL(c.visible,1)=1";
+			$sql.= " WHERE IFNULL(c.visible,1)=1";
 		}
 		$resql=$this->db->query($sql);
 		if ($resql)